@media (max-width: 400px) {
  .formulario {
    width: 100%;
  }
}

#contenedorCarga {
  margin: 0;
  padding: 0;
  background: #222;
  height: 120%;
  width: 100%;
  position: fixed;
  transition: 1s;
  z-index: 10000000;
  margin-top: -8em;
}
#carga {
  border: 15px solid #444;
  border-top-color: #e8521c;
  border-top-style: groove;
  height: 100px;
  width: 100px;
  border-radius: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;

  animation: girar 1.5s linear infinite;
}

@keyframes girar {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}